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Centering and inscription devices
Inscription devices
Potentiometer, white double
Molecular models, student
Pentode, high voltage
Slide rule (C)
Potentiometer, Model 7, deflection
pH meter, Model G
Temperature gauge
Set of glass dewars
Slide rule (B)
Protractor (B)
pH meter, Model G
pH meter, Model G
pH meter, Model M
Weather guide (2 views)
Ammeter, direct current, Model 1
Filmo projector bulb
Protractor
Hydrogen lamp power supply, Model B

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